This large unique cave is located about two miles east of Gene's Bay. It was discovered by William Sayle and, a group of Christians seeking religious freedom from Bermuda, now referred to as "The Eleutheran Adventures." They were shipwrecked off the Eleuthera coast on a reef called the Devil's Back Bone and took refuge here after coming ashore. They shaped an altar from a large boulder at the far end of the cave, which remarkably still stands, and conducted the island's first religious service there, earning the cave its name. The site is used by visitors and locals for picnics and other social outings because of the lovely white sandy beach nearby.